package jicheng03;

import java.util.Scanner;

public class 课堂 {
    public static void main(String args[]) {
        int month;
        Scanner sc = new Scanner(System.in);


        month = sc.nextInt();
        switch (month) {
            case 3:
            case 4:
            case 5:
                System.out.println("chunji");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println("xiaji");
                break;
            case 9:
            case 10:
            case 11:
                System.out.println("qiuji");
                break;
            case 12:
            case 1:
            case 2:
                System.out.println("dongji");
                break;
        }
    }
}



